Alternative to Files.probeContentType?

Question

In a web project, users upload their files, but when I receive them on the server, they are being stored as .tmp files rather than their original file extension (this is my

Answer 1

Take a look at the Apache Tika. It can easily determine a mime type:

 Tika tika = new Tika();
 File file = ...
 String mimeType = tika.detect(file);

Here's a minimal required maven dependency:

 
    org.apache.tika
    tika-core
    1.12